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Most are made from sterling silver (often rhodium plated); some designs use 18kt yellow gold plated over sterling silver.
Most examples use prong settings, typically 4-prong styles that secure the square-cut stones.
Secure-fit backings shown include screw-back posts, post-and-clutch (post and clutch) backings, and hinged post closures for hoops.
Sizes vary by style; listings show small studs around 4 mm (0.16 in × 0.16 in), 6 mm (0.24 in × 0.24 in) and 8 mm (0.31 in × 0.31 in) in width/length.
The assortment includes white/clear diamonds and blue diamonds, plus colored square gems such as green emeralds and blue sapphires.
